Sontaran Field Major Styre is conducting experiments on the survivors of future Earth in preparation of a full-scale Sontaran invasion of the planet. Can the Doctor defeat Styre and save the world?

• DirectorRodney Bennett
• Release1 March 1975
• Genre
  Science Fiction / Drama
• Duration0h 50m
• Budget?
• Revenue?
• Rate
  

  5.778
  9 reviews
• Productions

  BBC